/**
 *  uart_console.c - Console program based on uart.
 *
 *  Copyright (C) 2008-2010 ZhangHu
 *  All rights reserved.
 *  E-MAIL: anmnmnly@gmail.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
#include "drivers/chdev.h"
#include "drivers/uart.h"
#include "uart_console.h"


char_t RevByte(void)
{
    char_t ch = 0;
    chdev_t *dev = CDevOpen("uart0");
    if(dev == NULL)
    {
        return 0;
    }

    CDevRead(dev, &ch, 1);
    CDevClose(dev);

    return ch;
}



uint32 RevStr(char_t *buf, int32 len)
{
    int32 cnt = 0;
    chdev_t *dev = NULL;

    if(buf == NULL) {
        return 0;
    }

    dev = CDevOpen("uart0");
    if(dev == NULL)
    {
        return 0;
    }

    CDevRead(dev, buf, len);
    CDevClose(dev);

	return cnt;
}



void SendByte(char_t ch)
{
    chdev_t *dev = CDevOpen("uart0");
    if(dev == NULL) {
        return;
    }

    CDevWrite(dev, &ch, 1);
    CDevClose(dev);
}



uint32 SendStr(char_t *buf)
{
    int32 snd_cnt;
    char ch;
    chdev_t *dev = NULL;

    if(buf == NULL) {
        return 0;
    }

    dev = CDevOpen("uart0");
    if(dev == NULL)
    {
        return 0;
    }

	snd_cnt = 0;

    while(*buf != '\0') {
        ch = *buf;
        CDevWrite(dev, &ch, 1);
        snd_cnt++;
        buf++;
    }

    CDevClose(dev);

    return snd_cnt;
}



#include <stdarg.h>
#include <stdio.h>
// Not recommended to do so, but this function is very convenient.
void Print(char_t *fmt, ...)
{
    va_list ap;
    char_t str[128];

    va_start(ap, fmt);
    mac_disable_irq();
    vsprintf(str, fmt, ap);
    mac_enable_irq();
    SendStr(str);
    va_end(ap);
}



void Clear(void) {
    chdev_t *dev = (chdev_t*)CDevOpen("uart0");
    if(dev == NULL) {
        return;
    }

    CDevIoctl(dev, UART_CMD_RESET, NULL);
    CDevClose(dev);
}

